BANK1 functional variants are associated with susceptibility to diffuse systemic sclerosis in Caucasians.
Authors:
Rueda, B Gourh, P Broen, J Agarwal, SK Simeon, C Ortego-Centeno, N Vonk, MC Coenen, M Riemekasten, G Hunzelmann, N Hesselstrand, R Tan, FK Reveille, JD Assassi, S Garcia-Hernandez, FJ Carreira, P Camps, M Fernandez-Nebro, A Garcia de la Pena, P Nearney, T Hilda, D Gonzalez-Gay, MA Airo, P Beretta, L Scorza, R Radstake, TR Mayes, MD Arnett, FC Martin, J
Citation:
Rueda B, etal., Ann Rheum Dis. 2010 Apr;69(4):700-5. doi: 10.1136/ard.2009.118174. Epub 2009 Oct 8.
OBJECTIVE: To investigate the possible association of the BANK1 gene with genetic susceptibility to systemic sclerosis (SSc) and its subphenotypes. METHODS: A large multicentre case-control association study including 2380 patients with SSc and 3270 healthy controls from six independent case-control sets of Caucasian ancestry (American, Spanish, Dutch, German, Swedish and Italian) was conducted. Three putative functional BANK1 polymorphisms (rs17266594 T/C, rs10516487 G/A, rs3733197 G/A) were selected as genetic markers and genotyped by Taqman 5 allelic discrimination assay. RESULTS: A significant association of the rs10516487 G and rs17266594 T alleles with SSc susceptibility was observed (pooled OR=1.12, 95% CI 1.03 to 1.22; p=0.01 and pooled OR=1.14, 95% CI 1.05 to 1.25; p=0.003, respectively), whereas the rs3733197 genetic variant showed no statistically significant deviation. Stratification for cutaneous SSc phenotype showed that the BANK1 rs10516487 G, rs17266594 T and rs3733197 G alleles were strongly associated with susceptibility to diffuse SSc (dcSSc) (pooled OR=1.20, 95% CI 1.05 to 1.37, p=0.005; pooled OR=1.23, 95% CI 1.08 to 1.41, p=0.001; pooled OR=1.15, 95% CI 1.02 to 1.31, p=0.02, respectively). Similarly, stratification for specific SSc autoantibodies showed that the association of BANK1 rs10516487, rs17266594 and rs3733197 polymorphisms was restricted to the subgroup of patients carrying anti-topoisomerase I antibodies (pooled OR=1.20, 95% CI 1.02 to 1.41, p=0.03; pooled OR=1.24, 95% CI 1.05 to 1.46, p=0.01; pooled OR=1.26, 95% CI 1.07 to 1.47, p=0.004, respectively). CONCLUSION: The results suggest that the BANK1 gene confers susceptibility to SSc in general, and specifically to the dcSSc and anti-topoisomerase I antibody subsets.